<template>
  <div>
    <el-card class="box-card">
      <div slot="header" class="clearfix">
        <span>文章列表</span>
      </div>
      <!-- 搜索区域 -->
      <div class="search-box">
        <el-form :inline="true" :model="filter">
          <el-form-item label="文章分类">
            <el-select v-model="filter.cate_id" placeholder="请选择分类" size="small">
              <el-option :label="item.cate_name" :value="item.id" v-for="item in cateList" :key="item.id"></el-option>
              <!-- <el-option label="区域二" value="beijing"></el-option> -->
            </el-select>
          </el-form-item>
          <el-form-item label="发布状态" style="margin-left: 15px;">
            <el-select v-model="filter.state" placeholder="请选择状态" size="small">
              <el-option label="已发布" value="已发布"></el-option>
              <el-option label="草稿" value="草稿"></el-option>
            </el-select>
          </el-form-item>
          <el-form-item>
            <el-button type="primary" size="small" @click="search">筛选</el-button>
            <el-button type="info" size="small" @click="reseSearch">重置</el-button>
          </el-form-item>
        </el-form>
        <!-- 发表文章的按钮 -->
        <el-button type="primary" size="small" class="btn-pub" @click="addArtVisible=true">发表文章</el-button>
      </div>

      <!-- 文章表格区域 -->
      <!-- 文章表格区域 -->
      <el-table :data="artList" style="width: 100%;" border stripe>
        <el-table-column label="文章标题" prop="title">
          <template v-slot="scope">
             <el-link type="primary" @click="getArtDetail(scope.row.id)">{{scope.row.title}}</el-link>
          </template>
        </el-table-column>
        <el-table-column label="分类" prop="cate_name"></el-table-column>
        <el-table-column label="发表时间">
          <template v-slot="scope">
            {{ formatDate(scope.row.pub_date) }}
          </template>
        </el-table-column>
        <el-table-column label="状态" prop="state"></el-table-column>
        <el-table-column label="操作">
          <template v-slot="scope">
            <el-button size="mini" type="danger" @click="del(scope.row.id)">删除</el-button>
          </template>
        </el-table-column>
      </el-table>

      <!-- 分页区域 -->
      <el-pagination
      @size-change="handleSizeChange"
      @current-change="handleCurrentChange"
      :current-page="q.pagenum"
      :page-sizes="[2, 5, 10, 20]"
      :page-size="q.pagesize"
      layout="total, sizes, prev, pager, next, jumper"
      :total="total">
    </el-pagination>
    </el-card>
    <!-- 发布表单对话框 -->
    <el-dialog
      title="发表文章"
      :visible.sync="addArtVisible"
      fullscreen
      @close="onClose"
      :before-close="handleClose">
      
      <!-- 发布文章的表单 -->
      <el-form :model="pubForm" :rules="pubFormRules" ref="pubFormRef" label-width="100px">
        <el-form-item label="文章标题" prop="title">
          <el-input v-model="pubForm.title" placeholder="请输入标题"></el-input>
        </el-form-item>
        <el-form-item label="文章分类" prop="cate_id">
          <el-select v-model="pubForm.cate_id" placeholder="请选择分类" style="width: 100%;">
            <!-- <el-option label="区域一" value="shanghai"></el-option> -->
            <el-option :label="item.cate_name" :value="item.id" v-for="item in cateList" :key="item.id"></el-option>
          </el-select>
        </el-form-item>
        <el-form-item label="文章内容" prop="content">
          <quill-editor v-model="pubForm.content" @blur="$refs.pubFormRef.validateField('content')">
          </quill-editor>
        </el-form-item>
        <el-form-item label="文章封面" prop="cover_img">
          <!-- 用来显示封面的图片 -->
          <img v-if="preview" :src="preview" alt="" class="cover-img" ref="imgRef" />
          <img v-else src="../../../assets/images/cover.jpg" alt="" class="cover-img" ref="imgRef" />
          <br />
          <!-- 文件选择框，默认被隐藏 -->
          <input type="file" style="display: none;" accept="image/*" ref="iptFileRef"  @change="cImage"/>
          <!-- 选择封面的按钮 -->
          <el-button type="text" @click="$refs.iptFileRef.click()">+ 选择封面</el-button>
        </el-form-item>
        <el-form-item>
          <el-button type="primary" @click="add('已发布')">发布</el-button>
          <el-button type="info" @click="add('草稿')">存为草稿</el-button>
        </el-form-item>
      </el-form>
    </el-dialog>
    <!-- 查看文章详情的对话框 -->
    <el-dialog title="文章预览" :visible.sync="detailVisible" width="80%">
      <h1 class="title">{{ artInfo.title }}</h1>

      <div class="info">
        <span>作者：{{ artInfo.nickname || artInfo.username }}</span>
        <span>发布时间：{{ formatDate(artInfo.pub_date) }}</span>
        <span>所属分类：{{ artInfo.cate_name }}</span>
        <span>状态：{{ artInfo.state }}</span>
      </div>
      
      <!-- 分割线 -->
      <el-divider></el-divider>
      
      <!-- 文章的封面 -->
      <img :src="'http://big-event-vue-api-t.itheima.net' + artInfo.cover_img" alt="" />

      <!-- 文章的详情 -->
      <div v-html="artInfo.content" class="detail-box"></div>
    </el-dialog>
  </div>
</template>

<script>
import dayjs from 'dayjs'
export default {
  name: 'ArtList',
  data() {
    return {
      // 查询参数对象
      q: {
        pagenum: 1,
        pagesize: 2,
        cate_id: '',
        state: '',
        
      },
      addArtVisible:false,
      pubForm:{
        title: '',
        cate_id: '',
        content:'',
        cover_img:'',
        state: ''
      },
      pubFormRules:{
        title: [
        { required: true, message: '请输入文章标题', trigger: 'blur' },
        { min: 1, max: 30, message: '文章标题的长度为1-30个字符', trigger: 'blur' }
        ],
        cate_id: [{ required: true, message: '请选择文章分类', trigger: 'click' }],
        content:[{ required: true, message: '请输入文章内容', trigger: 'blur' }],
        cover_img:[{ required: true, message: '请选择图片', trigger: 'click' }]
      },
      cateList:[],
      preview:'',
      artList:[],
      total:0,
      filter:{
        cate_id:'',
        state:''
      },
      artInfo:{},
      detailVisible:false
     
    }
  },
  methods:{
    handleClose(done) {
        this.$confirm('此操作将永久关闭, 是否继续?', '提示', {
           type: 'warning'
        })
          .then(_ => {
            done()
          })
          .catch(_ => {})
      },
      // 获取所有文件分类
      async getArtCate(){
        const {data:res} = await this.$http({
          method:'get',
          url:'/my/cate/list'
        })
        if(res.code !== 0) return this.$message.error(res.message)
        this.cateList = res.data
      },
      cImage(e){
        const file = e.target.files[0]
        if(file){
          this.pubForm.cover_img = file
          this.preview = URL.createObjectURL(file)
        } else{
          this.pubForm.cover_img = ''
          this.preview =''
        }
        this.$refs.pubFormRef.validateField('cover_img')
      },
      add(state){
        this.pubForm.state = state
        this.$refs.pubFormRef.validate(async valid=>{
          if(!valid) return
          // 表单数据合法
          const fd =new FormData()
          
          for(let k in this.pubForm){
            fd.append(k,this.pubForm[k])
          }
          const {data:res} = await this.$http({
            method:'post',
            url:'/my/article/add',
            data:fd
          })
          if(res.code !== 0) return this.$message.error(res.message)
          this.$message.success(res.message)
          // 关闭对话框
          this.addArtVisible = false
          this.getArtList()
        })
      },
      onClose(){
        // 表单清空
        this.pubForm={
          title: '',
          cate_id: '',
          content:'',
          cover_img:'',
          state: ''
        }
        // 将预览图片清空
        this.preview = ''
      },
      // 获取文章列表
      async getArtList(){
        const {data:res}=await this.$http({
          method:'get',
          url:'/my/article/list',
          params:{
            ...this.q
          }
        })
        if(res.code !== 0) return this.$message.error(res.message)
        this.artList=res.data
        this.total=res.total
      },
      // 格式化时间
      formatDate(val){
        return dayjs(val).format('YYYY-MM-DD HH:mm:ss')
      },
      handleSizeChange(size){
        this.q.pagesize = size
        this.getArtList()
      },
      handleCurrentChange(pNum){
        // 获取页码值
        this.q.pagenum=pNum
        // 再次调用
        this.getArtList()
      },
      search(){
        this.q.cate_id = this.filter.cate_id
        this.q.state=this.filter.state
        this.q.pagenum=1
        this.getArtList()
      },
      reseSearch(){
        this.filter={
          cate_id : '',
          state:''
        },
        this.p={
          cate_id:'',
          state:''
        }
      },
      del(id){
        this.$confirm('此操作将永久删除该文章, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(async () => {
          const {data:res} = await this.$http({
            method:'delete',
            url:'/my/article/info',
            params:{
              id:id
            }
          })
          if(res.code !== 0) return this.$message.error(res.message)
          this.$message.success(res.message)

          if(this.artList.length === 1 && this.q.pagenum > 1) {
            this.q.pagenum--
          }
          this.getArtList()
        }).catch(() => {
          this.$message({
            type: 'info',
            message: '已取消删除'
          });          
        });
      },
      async getArtDetail(id){
        const {data:res} = await this.$http({
          method:'get',
          url:'/my/article/info',
          params:{
            id:id
          }
        })
        if(res.code !== 0) return this.$message.error(res.message)
        this.artInfo = res.data
        this.detailVisible = true
      }
  },
  created(){
    // 获取文章分类
    this.getArtCate()
    // 获取文章列表
    this.getArtList()
  }
}
</script>

<style lang="less" scoped>
.search-box {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  .btn-pub {
    margin-top: 5px;
  }
}
// 设置富文本编辑器的默认最小高度
/deep/ .ql-editor {
  min-height: 300px;
  }

// 设置图片封面的宽高
.cover-img {
  width: 400px;
  height: 280px;
  object-fit: cover;
}
.el-pagination {
  margin-top: 15px;
}
.title {
  font-size: 24px;
  text-align: center;
  font-weight: normal;
  color: #000;
  margin: 0 0 10px 0;
}

.info {
  font-size: 12px;
  span {
    margin-right: 20px;
  }
}

// 修改 dialog 内部元素的样式，需要添加样式穿透
/deep/ .detail-box {
  img {
    width: 500px;
  }
}
</style>
